Refrigerating system.



G. J. SAYER.

REFBIGERATING SYSTEM.

APPLICATION FILED FEB. 2, 1914.

Patented July 27, 1915.

PATENT OFFICE.

GEORGE J. SAYER, OF CHICAGO, ILLINOIS.

BEFB-IGERATING SYSTEM.

Specification of Letters Patent.

Patented July 2'7, 1915.

Application filed February 2, 1914. Serial No. 816,021.

To all whom it may concern:

Be it known that I, GEORGE J. SAYER, a citizen of the United States,residing at Chicago,in the county of Cook and State of Illinois,haveinvented a certain new and useful Improvement in Refrigerating Systems,of which the followin'gisa full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a part of thisspecification.

My invention relates to refrigerating systems and more particularly tothat class of refrigerating systems in which a plurality of rooms orchambers are supplied with refrigerants from a common source.

The supply of refrigerant to any one room may be stopped when thetemperature of that room has reached a predetermined amount. and inwhich the actuations of a prime mover operating therefrigeravting pumpare controllable in such a'way that whenever the supply of refrigerantto all of the rooms is cut off, that the operations of said prime moverthen cease, but that the stoppage of flow of refrigerant to any one ormore of said rooms, less than all, will not stop or interfere with theoperations of said prime mover.

My invention concerns itself more particularly with the mechanism whichis designed individually for each room to control the How of refrigerantthereto and which at the same time has means to effect control of themotor.

I will explain my invention more in detail by reference to theaccompanying drawings, in which- Figure 1 sets forth diagrammatically asystem arranged in accordance with my invention; Fig. 2 is a viewpartially in section of the individual room controlling mechanism, andFig. 3 is a fragmentary view of a portion of this mechanism more clearlyto reveal features of construction.

Referring more particularly to Fig. 1, I show a plurality of rooms 1, 2and 3 to which refrigerant is to be supplied under the control of myimproved devices 4. The refrigerant leaves the rooms by means of thetubes 1 show a refrigerating pump 6. although I do not indicate itsassociation with the tubes 7 by means of which it supplies refrigerantsto the rooms, nor its connection with the tubes 5 by which it withdrawsth'"refrigerant from the rooms. Of

course, suitable mechanism such as a condenser and storage compartmentmay be utilized, or whatever other equipment shall be found necessary;nor have I shown the expansion valve which is preferably interposedbetween the device 4 and the room in the tube 8. The refrigerating pump6 is operated by a suitable motor 9 and this 1110-.

tor receives its current from a suitable source of supply 10 hereindicated as a generator.

It will be seen that the connection to close the circuit between themotor and the generator can be closed at either of the devices 4 as willbe apparent hereafter, but that should the connections of all of thedevices 4 be open, that then the motor will be without current and willcease to operate the refrigerator pump6.

My improved device 4 is shown more clearly in Figs. 2 and 3 and consistsin the form herein disclosed ofa valve casing 11 fixedly secured to amounting bracket 12. This bracket 12 also carries other parts as will bepresently explained. The valve casing 11 carries a valve 13 suitablysupported upon a spindle 14 passing through the stuffing box 15. Aspring16 normally holds the valve 13 against its seat 17. The valve is adaptedto control the flow of fluid from the tube 18 toward the tube 8, whichleads directly into the refrigerating chamber. The position of the valve13 is regulated by a thermostat 19 as will presently appear. The valvespindle 14 has a socket 20 at its lower extremity by means of which thevalve spindle is moved through the interposition of the lever 21 whichlever 21 is preferably mounted upon the bracket 12. The spindle at itslower extremity also carries an insulating button 23 to engage andactuate a switch arm 24, which switch arm is adapted to close circuitwith a stationary switch' ele- ,ment 25 mounted on the insulating arm26. A spring 27 normally tends to hold the switch element 24 away fromthe switch element 25. The circuit which is closed by this switchextends from the generator 10 through conductor 28, switch arm 24,switch element 25, conductor 29, motor 9, conductor30. back to thegenerator or source of supply 10. Similarly the circuit through themotor is controlled by parallel circuit connections for the otherdevices 4.

Now in order to operate the valve 13 either to its closed or openposition, I utilize a motor 31 mounted upon the bracket 12, which motorthrough the interposition of the pinions 32, 33, 34 and 35 drives thewheel 36. The wheel 36 carries a conducting ring "37 having an aperture38 at one portlon thereof, the rim of said aperture being bushed by theinsulating bushing 39. A

the ring 37 at all times and is electrically connected by means of the.conductor 43 with one terminal of the motor 31., The other terminal ofthe motor is connected by means of the conductor 44 with one terminal ofthe set of batteries 45, the other terminal of said set of batteriesbeing connected by means of the conductor 46 with one terminal of thethermostat 19. The thermostat also has two other contact terminals 47and 48 respectively and these are connected re spectively to contactsprings 49 and 50. The contact springs 49 and 50 normally tend to engagethe ring- 37 and in fact do so, except whenever either one of thesesprings is over the aperture 38, at which time that particular spring isnot in electrical contact with the ring 37. e

In the illustration as shown, the valve is shown as closed, the Wheel 36having moved in the direction of the arrow, as shown, and

current having been supplied by means of the spring 49 to the motor. Themotor was driven until the aperture 38 came under the spring 49, atwhich time this circuit was broken, and at which time this valve wasfully closed. The motor then stopped andno further movement of the valvetakes place until the thermostatic element 19 has moved into contactwith the conducting post 48, at which time current is supplied to thespring 50 to again start the motor, which will thereupon drive the Wheel36 until the aperture 38 is under the spring 50 so that this spring 50then no longer makes contact with the ring 37. At this time the valvewill be fully open. This condition of things will then obtain until thethermostatic element 19 again makes contact with the post 47.

- Now'in order to move the Valve from one position to the other thelever 21 has a slot 51, which slot is in operative relation to a roller52 carried by the wheel 36-. Thus as this wheel 36 is rotating, it tiltsthe lever 21 about its pivotal point 22 and when the roller 52 is in itsuppermost position, the valve is fully open, and when the roller is inits lowermost position the valve is fully closed.

From what has been described, the nature of my invention will beentirely clear to those skilledin the art, and it will also be clearthat my invention is susceptible to a variety of diiierent modificationswithout departing from its spirit.

Having however thus described one form which my invention may take, whatI claim as new and desire to secure by Letters Patent is:

1. In a refrigerating system the combination with a plurality of valves,of an equal plurality of motors for moving said respective valves intotheir closed or open position, means interposed between each motor andits associated valve to limit each individual action of the motor tomove its associated valve from one alternative position to the other,and an electric circuit conjointly controlled by all of said valves. 2.In a refrigerating system the combination with a plurality of valves, ofan equal plurality of motors for moving said respective valves intotheir closed or open position, means interposed between each motor andits associated valve to limit each individual action of the motor tomove its associatedvalve from one alternative position to the other, anda switch element movable conjointly with its associated valve, saidswitch elements conjointly controlling an electric circuit.

In witness whereof, Ihereunto subscribe my name this 17th day ofJanuary, A. D.

GEORGE J. SAYER. Witnesses O. M. A. CHAPIN, JOHN M. Pn'rsason.

